Platinum complex and light-emitting device

• US 20080036373A1
• Filed: 08/08/2007
• Published: 02/14/2008
• Est. Priority Date: 08/10/2006
• Status: Abandoned Application

• Current Assignee: Takasago International Corporation
• Original Assignee: Takasago International Corporation
• Inventors: Iwata, Takeshi, Matsushima, Yoshimasa, Itoh, Hisanori
• Application Number:
  US11/882,976
• Publication Number:
  US 20080036373A1
• Time in Patent Office: Days
• US Class Current: 313/504
• CPC Class Codes: C07D 231/12 with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms
• CPC Class Codes: C07D 231/38 Nitrogen atoms nitro radicals C07D231/16
• CPC Class Codes: C07D 401/12 linked by a chain containing hetero atoms as chain links
• CPC Class Codes: C07D 401/14 containing three or more hetero rings
• CPC Class Codes: C07D 403/04 directly linked by a ring-member-to-ring-member bond
• CPC Class Codes: C07D 403/12 linked by a chain containing hetero atoms as chain links
• CPC Class Codes: C07D 471/04 Ortho-condensed systems
• CPC Class Codes: C07F 15/0086 Platinum compounds
• CPC Class Codes: H10K 2101/10 Triplet emission
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 50/14 Carrier transporting layers
• CPC Class Codes: H10K 85/324 comprising aluminium, e.g. Alq3
• CPC Class Codes: H10K 85/346 comprising platinum

Abstract

A platinum complex represented by the general formula (1) below, useful as a phosphorescence emission material, a tetradentate ligand useful for synthesizing the platinum complex, and a light-emitting device containing at least one of the platinum complex.

wherein ring B represents a nitrogen-containing aromatic heterocyclic ring; rings A, C and D each independently represent an aromatic or aromatic heterocyclic ring, while either of the rings C and D represents five-membered ring, the other represents a five- or six-membered ring; R^A, R^B, R^C, and R^D respectively represent substituents on the rings A, B, C, and D; two of X^A, X^B, X^C, and X^D represent a nitrogen atom that may be bound with the platinum atom by a coordinate bond, the others each independently represent a carbon atom or nitrogen atom that may be bound with the platinum atom by a covalent bond; Q represents a bivalent atom or atomic group bridging the rings B and C; and Y^C and Y^D each independently represent a carbon atom or nitrogen atom.

Claims

1. A platinum complex represented by General Formula (1):

wherein ring A represents a six-membered aromatic ring or a six-membered aromatic heterocyclic ring;

ring B represents a five-membered nitrogen-containing aromatic heterocyclic ring;

rings C and D each independently represent an aromatic ring or an aromatic heterocyclic ring, while either of the ring C or D represents five-membered ring, the other represents a five- or six-membered ring;

R^A, R^B, R^C, and R^D respectively represent substituents on the rings A, B, C, and D;

the rings A and B, the rings B and C, and the rings C and D each may be bound each other via the substituent R^A, R^B, R^C or R^D to form a fused ring independently;

two of X^A, X^B, X^C, and X^D represent a nitrogen atom that may be bound with the platinum atom by a coordinate bond, while the other two each independently represent a carbon atom or nitrogen atom that may be bound with the platinum atom by a covalent bond;

Q represents a bivalent atom or atomic group bridging the rings B and C;

the ring B and Q, and the ring C and Q each independently may be bound each other via a substituent R^B or R^C to form a fused ring;

Y^C and Y^D each independently represent a carbon atom or a nitrogen atom;

nA is an integer of 0 to 4, nB is an integer of 0 to 2, nC is an integer of 0 to 2 when the ring C is five-membered ring or an integer of 0 to 3 when the ring C is six-membered ring, and nD is an integer of to 3 when the ring D is five-membered ring or an integer of 0 to 4 when the ring D is six-membered ring; and

when nA, nB, nC or nD is 2 or more, the groups R^A, the groups R^B, the groups R^C, and the groups R^D each independently may be bound each other to form a fused ring.

2. A light-emitting device containing one or more of the compound represented by General Formula (1) described in claim 1.

3. The light-emitting device according to claim 2, wherein the light-emitting device is one having a light-emitting layer or plural organic compound layers including a light-emitting layer between a pair of electrodes and contains one or more of compounds represented by General Formula (1) in one or more of the layers.

4. The light-emitting device according to claim 3, wherein the light-emitting device is an organic electroluminescent device (organic EL device).

5. The light-emitting device according to claim 4, wherein the compound represented by General Formula (1) and contained in one or more of the layers is able to act as a doping material (guest material) in the light-emitting material of the organic electroluminescent device.

6. A compound represented by General Formula (2):

wherein ring A represents a six-membered aromatic ring or a six-membered aromatic heterocyclic ring;

ring B represents a five-membered nitrogen-containing aromatic heterocyclic ring;

rings C and D each independently represent an aromatic ring or an aromatic heterocyclic ring, while either of the ring C or D represents five-membered ring, the other represents a five- or six-membered ring;

R^A, R^B, R^C, and R^D respectively represent substituents on the rings A, B, C, and D;

the rings A and B, the rings B and C, and the rings C and D each may be bound each other via the substituent R^A, R^B, R^C, or R^D to form a fused ring independently;

two of X^A′

, X^B′

, X^C′

, and X^D′

represent a nitrogen atom having a lone electron pair, while the other two represent CH or NH;

Q represents a bivalent atom or atomic group bridging the rings B and C; and

the ring B and Q, and the ring C and Q each independently may be bound each other via a substituent R^B or R^C to form a fused ring;

Y^C and Y^D represent a carbon atom or a nitrogen atom;

nA is an integer of 0 to 4, nB is an integer of 0 to 2, nC is an integer of 0 to 2 when the ring C is five-membered ring or an integer of 0 to 3 when the ring C is six-membered ring, and nD is an integer of 0 to 3 when the ring D is five-membered ring or an integer of 0 to 4 when the ring D is six-membered ring; and

when nA, nB, nC or nD is 2 or more, the groups R^A, the groups R^B, the groups R^C, and the groups R^D each independently may be bound each other to form a fused ring.